2004 Cadillac XLR Owner's Manual - Page 297

If a Tire Goes Flat It's unusual for a tire to "blow out" while you're driving, especially if you maintain your tires properly. If air goes out of a tire, it's much more likely to leak out slowly. See Tires on page 5-50 for additional information. Your vehicle, when new, had run-flat tires. This type of tire can operate effectively with no air pressure, so you won't need to stop on the side of the road to change a flat tire. You can just keep on driving. The shorter the distance you drive and the slower the speed, the greater the chance that the run-flat tire will not have to be replaced. Run-flat tires perform so well without any air that a Tire Pressure Monitor (TPM) is used to alert you if a tire has lost pressure. See Run-Flat Tires on page 5-56 and Tire Pressure Monitor System on page 5-58. 3. Lift the vehicle with the jack, making sure the jack spans at least two of the crossmember ribs (B). For more information, see Doing Your Own Service Work on page 5-3. 5-73